Spring shade roller



Nov. 24, 1925- v 563.2

A. ECKERMANN SPRING SHADE ROLLER Filed Sept 18. 1924 N \v I JZ Eae inann v w. T

Quailim gmmtoz Patented Nov. 24, 1925.

PATENT mas.

AUGUST ECKERMANN, or new roan, n. Y.

SPRING- SHADE ROLLER.

Application filed Fficptember 18, 1924.

To all whom it may concern:

Be it known that 1, AUGUST ECKERMANN, a citizen of the United States, residing at New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Spring Shade Rollers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention provides a positive control for shade rollers of the spring type and simplifies the construction and reduces the numher of parts.

Other objects and advantages will be apparent and suggest themselves as the nature of the invention is understood.

While the drawings illustrate an embodiment of the invention it is to be understood that in adapting the same to meet different conditions and requirements, various changes in the form, proportion and minor details of construction may be resorted to without departing from the nature of the invention,

Referring to the accompanying drawings forming a part of the specification,

Figure 1 is a front view of the upper portion of a window provided with a spring actuated shade roller embodying the inven tion,

Figure 2 is a detail view of the controlling means, parts being shown on a larger scale,

Figure 3 is a detail sectional view on the line 33 of Figure 2, and

Figure 4 is a detail perspective view of the detent.

Corresponding and like parts are referred to in the following description and designated in the several views of the drawings by like reference characters.

The numeral 10 denotes a window frame and 11 a spring actuated shade roller provided at opposite ends with pins 12 and 13, the pin 12 being stationary and the pin 13 fixed to the roller 11 so as to rotate therewith. The usual coil spring 14'disposed within an opening formed in the roller 11 is attached at one end to the pin 12 and at its opposite end to the roller 11 so that-when the latter is rotated in one direction the spring 14 is wound and operates to rewind the shade 15 upon the roller, it being understood that the spring 14 is wound as the Serial No. 738,461.

shade 15 is drawn and unwound from the roller.

A box 16 is attached to the window frame and the pin 13 is journaled therein as shown most clearly in Figures 2 and 3. A side portion of the pin 18 is cut away to provide a tooth or shoulder 17 which forms a stop to coact with a detent 18 whereby the pin 13 and roller 11 are held in the required adjusted position to maintain the shade 15 in the desired adjusted position. A spring 19 normally urges the detent 18 upwardly to hold it in engagement with the pin .13 and a cord 20 or like flexible connection is attached at one end to the detent 18 and at its opposite end to the stick or like part reinforcing the lower end of the shade 15. The detent 18 has opposed lateral extensions 21 and 22 at its upper end which are at different elevations and whose extremities engage opposite sides of the box 16 whereby to centralize and direct the upper end of the detent in its movements. The lateral extension 22 has a depressed portion 28 which conforms to the pin 13 and a tooth 24 at the upper end of the detent engages and coacts with the stop 17 to hold the shade 15 in the required adjusted position.

When the shade roller is properly applied to the window and the shade 15 is wound thereon, the spring 14is under sufficient tension to insure the winding of the shade when drawn down. As the shade 15 is drawn down or unwound from the roller, the tension of the spring 14 is increased and the detent 18 engaging the stop 17 holds the shade in the required adjusted position. When it is required to raise the shade the cord 20 or like part is pulled upon thereby disengaging the detent from the pin 13 with the result that the spring 14 reacting rotates the roller 11 to wind the shade thereon. It is observed that the same cord or connection 20 is utilized to lower the shade and also to release the detent 18.

What is claimed is A detent device for a spring shade roller trunnion, said device comprising a casing having an opening to receive the trunnion, a detent member within the device, said memher being in a single piece generally disposed midway of the casing, said detent member having lateral projections at opposite sides thereof to engage opposite sides of the easing to guide the moven'ient of the detent member, one of said projections being; higher than the other and provided with a curved bearing surface for engagement with the trunnion, said projection having a tooth at said surface to engage the trunnion notch, an expansive spring surrounding the detentmember engaging the lower wall of the cas ing and the lowermost projectioin said detent member extending through the lower Wall of 10 the rnsing to facilitate operation.

In testimony Whereo'i I afiix my signature.

AUGUST ECKERMANN. 

